[tlm225]

Absolutely. There are a couple of benefits. They allow more trigger time for less ammo cost. Quality practice allows the fundamentals to become ingrained. A partner of mine has arthritis in his wrist. After 30-40 rounds of full power stuff the pain causes him to begin flinching. The .22 adapter for his Glock allows him to shoot almost unlimited rounds and he finishes his sessions with about 25 rounds of "the real thing". Since he started doing this his scores have gone up significantly, including those with full power ammo.

As for myself, 30 years ago I was a pretty good handgun shooter but had plenty of room for improvement. I bought a S&W model 17 (K-22) and put thousands of rounds through it. The accuracy of the K-22 and the abundant practice paid off.